Carbureter.



M O S N H HU ,J F. C.

APPLICATION FILED AUG,12, 1912,

W., 5 n l O imi. .M ,1./1 Y W FF n. 1 wmw IIIIIIII 1 ig. l.

WIM/8858: am www o. F. JOHNSON.

GARBURETER.

APPLICATION FILED AUG.12,1912,

Patented Apr. 2,2, 19153,

2 SHEETS-SHEET 2.

WIT/VESE: wwf 0 63 1s carried' b 40 the desired p 64. .A small disl end @t this screw the tapering 'A almost in contact with the di the nozzle'28- .The is asfollows. Fuel will flow loat chamber26 the ioat 44 is so that under normal gin is stop ed, th v28 (will be gbove the float chambe the upper end of this n of the fuel in the float that, as soon as the air rushes ix'i j lsage 67 and down betweenfthe 50 and the depressed port-ion z d up through the um will occur at which has a reduced portion 39 connectical passage 40. Mounta pin 43 which carries d with u small metal arm valve 4G restsf is at the predetermined will be held upward by e passage 40, but when i 26 falls, the passage 40 replenished. The aat and valve are well ingto the small vert ed in the lugs 42 is a tio'at 44 provide 5 45 on which thc the level of the fuel height, the valve 4G the float to close th 'the l'uel in the cuj 10 will he openc construction of the tio d and the fuel d within the cylindrical ureting chamber is a lower end '50 is ardly, as shown ermed a strangle- Securely mount@ portion 2 of the c 15 cylindrical tube,48 w

conical and tapers downw in Fig. l, to form what is t ltube. This tube 48 has a as shown in Fi 20 connecting the cylindrical conicalportion 50. in this tube is a sle Lconnected to it by v stantiallythe 'U25 bars 52 just4 formed with a small perforat .the pin 56 on the inner end o jouitnaled in the side wall of t chamber, which pin l1 30 its outer'end eng spring 60, which 58 in any desired the turning of the the. height of the sleeve 53 and 'lvrticallyslidable in the s hat, cylil'idricall air-valve 61 spider 62 in its lower endfor arms meeting ngt the een y this spider and is held in ion by means of a jam-nut 65 is secured to the lower 63 and extends down into .50 until it is scharge end of operation of Ythis device g. 2 and Fig. 5, the bars 52 portion 48 and the Slidably mounted witheve 53 having a ring 54 means of bars 55 of subsame width and length as the his sleeve is ion to receive f ,the shaft 57,r I he carbureting as a milled head 58 on aged by one-end 59 of the spring will hold the head position but will permit der to adjust leeve 53 is a which has a med by four strangle-tube from the pipe 37 to the in the usual manner and constructed and adjusted conditions, when the`ene 'upper end of the nozzle the line 66 of the fuel in he distance between ozzle 28 and the level eh'imber will loe/such engine begins to rev ugh the passtrangle-tube El of the da strangle-tube, the upper end euel te iiow is lnozzle into th phram 20, an a slight vaou of the nozzle 28, out through th the inrushing againstand arouudt he` edge. et` the disk 65 on the stem 63, will lift this disk and With it the cylindrical valve 6l. As soon as this valve leaves its resting place, that is the ring 54, air will also iow. in through the openings between the bars 52 and 55. The height 7 that this cylindrical valve will be lifted will depend upon the How of the air around the disk 55, and when this flow otair decreases, c the valve will innnediately fall. 'l'n practice, the height of the valve is substantially sta- '75 tionary because of the balance attained between the weight of the valve and the upward urge of the current of The flow of the air between the strangle-tuber() and the depression 21 andup through the`g0 strangletube itself over t-he nozzle 28, will vary substantially with the speed 'of the engine and the lift of the valve 61.

The throttle-valves l5 of carbureters are usually so constructed as to leave a slight opening around them so that an vunloaded engineean slowly operate when the valve is in closed position. The amount of air, which is drawn into the engine through they' tube l0, and the amountvof gasolene mixed therewith, will Vof course vary with the type of engine, and the amountof gasolene taken up .by the inrushing air will depend upon the distance between the disk 65 andthe top of the nozzle 28, the less thefdistance, the less fuel being taken up. This is for the reason that when the disk-65 leaves the upf per end of the nozzle 28Aunder a greater rushof air, there results a. slightly greater vacuum at .the opening .and almere rapid How of fuel.

.lt is'sometimes desirable to adjust the po- Y sition of the disk 65 with reference to the nozzle 28 because of a' difference in the fuel employed for operating the engine. In such case, the button 58 on the shaft 57 may be Aturned so that the crank-pin 56 will shift the sleeve 53 and the ring 54, thereby4 altering the distance between the nozzle 28 and the disk 65. As this'adjustment can easilybe 110 made without taking apart the carbureter, the initial adjustment. of the disk 65 can be made at the factory where the 'carhureters are produced. As the air which enters the passage 67 flows entirelyA around the cylin- 115 drical tube 48, the sleeve 53 and the tubular valve 6l, the air will enter the ditferent lopenings between. the bars 52 and 55 and thoroughly mix with the air and fuel pass-e ingup through the,V stron le-tube and 12o through the spider 62 at the'lower -end of the cylindrical valve. i

The details of construction of the various' parts and the means of adjustingthe same as well as 'the ro ortionsA between 125 them, Amay all be varied by those skilled in the'art without departing from the spirit ofiny invention.

I claim.

l. .ln a carbureterjthe combination with 21130,. .Ef/5 L;

lower. end of said cylindrical downwardly extending portion of the diaphragm, a cylindrical tube securely mounted in the upper part of said carbureting chamber and havino' air inletsfa downwardly tapering tu'e connecting to the tube and' mounted concentric with ,said fuel-nozzle and extending into said downwardly exv tending portion of the diaphragm, a 'ver.

tical adjustable sleeve mounted within said cylindrical tube and provided with air inlets and-having a ring at its lower end, and a cylindrical valve slidablyrnounted .within said sleeve and normally resting on said ring andclosing/the air inlets.

9. In 'a' carbureter, the combination with 'acarbureting chamber, a fuel reservoir adnozzle extending into said downwardly extending portion of .drical tube and provided 'i jacentjhere'to, the `bottom Iof the carbureter '20' constituting a' diaphragm having a downwardly extending central' portion, a fuelfrom said A`fuel`chamber up the diaphragm, a cylindrical mounted in theupper end of ing vchamber tube securely sald carburetand having alfr lnlets, a downwardly ntapering tube. connectingry to the lower end of -said cylindrical tube and mounted concentric with said\ fuel inletand extending into said downwardly extending lportion of the diaphragm, a yertically adthe cylindrical valve may be raised to open said air inlets when the rush of. air up lv 'outlet connection of the into said depression,

a disk on the lower "the taperingl tube and through the downwardly tapering tube isv suticient'to. carry the weightl of said valve.

l0. l n a carbureter, the combination of a body having an' air inlet opening in its side and a bottoni provided with a central depression, said body having a cylindrical outlet connection, a fuel-nozzle connected to said body and discharging into said depres-. sion, a downwardly tapering tube extend-. ing into said depression, a cylindrical airvalve slidably mounted above the tube and- .A

extending upwardlyint'o said cylindrical.

body and adapted to be raised'by the flow of air upward through said downwardly tapering tube. v

1l. In a carbureter, the combination of ai body having an air inlet opening invits side f 'A and a bottom provided with a central depression, said body having a cylindrical outlet connection, a' fuel-nozzle connectedto said body and discharging into said depresl sion, 'a downwardly tapering tube extending a cylindrical air-valve mounted above the tube and extendingupwardly into said cylindrical outlet connection of the body, a `stern extending downwardly fromv the lower end of the valve, and end ,of the stem within -in the path of air ascending in said tube, vsaid disk so proportioned and positioned that the valve will Ibe lifted when the upward iow of--air examount so as to adof the valve and ceeds a predetermined mit air between the bott'om the top of the tapering tube.-

In testimony whereof I have signed this specification' in the presence of two subscribing witnesses.

l Witnesses:

EDWARD N. PAGELSEN, ELIZABETH M. BROWN.

CHESTER. F. .JOHNSON` 

